stop inference on stop pressed

small fixes

Azaion.Inference/constants.pyx

@@ -11,8 +11,6 @@ cdef str QUEUE_CONFIG_FILENAME = "secured-config.json"
 cdef str AI_MODEL_FILE_BIG = "azaion.onnx.big"
 cdef str AI_MODEL_FILE_SMALL = "azaion.onnx.small"
 
-cdef bytes DONE_SIGNAL = b"DONE"
-
 cdef log(str log_message, bytes client_id=None):
     local_time = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime())
     client_str = '' if client_id is None else f' {client_id}'

Azaion.Inference/requirements.txt

@@ -1,3 +1,4 @@
+pyinstaller
 Cython
 opencv-python
 numpy